Hatoras nedarim is a form of debt relief.
When a father or husband is able to absolve the vows of his daughter or wife it means women were unable to contract debts, and so women could not be made subject to coersion should they become unready, unwilling or unable to repay the debt.
Hatoras nedarim is a form of limited liability, for the limitation of liability the laws of incorporation embody is the liability to debt.
The laws of limited liability are a permanent form of bankruptcy protection. The laws of limited liability say the corporation can go bankrupt without the shareholders in the corporation feeling the liability of that debt.